Disconnect plug receptacle



Aug 29, 1944.

R. l. MARKEY DISCONNECAT PLUG RECEPTACLE Filed Dec. 1s, 1942 FIG. l.

INVENTOR.

\ ROSCOE I. MAR/5y T TUR/Vf V Abomb rack or shackle.

Patented Aug. 29, 1944 DISCONNECT PLUG REGEPTACLE Roscoe I. Markey, East Orange, N. J., assignor to Pollak Manufacturing Company,

Arlington,

N. J., a corporation of New Jersey Application December 16, 1942, Serial N0. 469,262

5 Claims.

The invention relates to disconnect plug receptacles particularly adapted for use on bomb racks or shackles. -f

The primary object f the invention is to provide a receptacle of this nature which is quickly detachable.

Another object is to provide a receptacle that is full circle swiveling. In other words it may be attached to the bomb rack or other article at any desired angle with the same ease.

Still another object is to provide a receptacle which may be completely disassembled without unsoldering any joints and by the removal of only one nut.

A further object is to provide a receptacle which permits of the quick removal of any unit in the bomb rack which has a lead wire attached tha terminates in the receptacle.

Other objects and advantages will become apparent as this specification proceeds. Referring to the drawing forming a part thereof and in which a preferred form of the invention is illustrated: y

Fig. 1 is an elevational view of the receptacle mounted on a bomb rack; f

Fig. 2 is an elevational view looking at right angles to Fig. 1; I Fig. 3 is a longitudinal sectional view on a somewhat larger scale; and

Figs. 4, and 6 are cross sectional views taken on the lines 4 4, 5 5, and 6-6 respectively of Fig. 3. p

Referring again to said drawing the reference numerals III-I0 designate the side plates of a The mechanism of the bomb rack having nothing to do with the Present invention is not illustrated. Obviously while the receptacle was particularly designed for use on a. bomb rack or shackle and is illustrated in connection therewith it may readily be used in numerous other places.

The receptacle comprises a body member II which has a downwardly extending ear or lip I2 provided with an opening I3. The body portion I2 is counterbored at I4 to accommodate the neck I5 of a. base portion I6. A splash-proof gasket is confined between the neck I5 and the shoulder formed by the counterbore I4. This gasket acts to prevent the admission of any oil from the bomb rack mechanism or moisture of any nature into the interior of the receptacle.

The base portion I6 has an opening I8 which in the assembled condition is in line with the opening I3 in the ear I2 of the body portion. A bolt passes through the openings I3 and I8 and through aligned openings in the side plates |0|0 0f the bomb rack. An insulating sleeve 2| surrounds the bolt 20 and is confined between the remote side plate III and the outer wall of the base portion.

A shouldered washer 2,2 is set into the remote side plate I0 and the head 23 of the bolt 20 engages this washer. A spacer 24 is set into the side plate adjacent the receptacle and the bolt with its sleeve and the connecting wires 25 pass through this spacer. The connecting wires pass on to various electrical mechanisms in the bomb rack for operating the same.

From the foregoing it is thought to be apparent that the receptacle is secured together in its assembled condition and to the bomb rack with only one bolt. By virtue of this construction a full circle swiveling of the receptacle is provided for. In other words, the receptacle may be positioned at any desired angle with great ease and very little effort. This is quite advantageous, particularly in bomb racks for air craft where space is a vital factor.

The upper part of the body portion I I is threaded at 26 for the reception of the disconnect plug (not shown) and is provided with a longitudinally extending bead 21 which co-operates with a groove in the disconnect plug and insures the plug and receptacle always being maintained in the proper relation to each other.

Another feature of the invention is the ccnstruction of the insert which carries the contact pins 28. It is the usual practice to mold the contact pins into the insert. In accordance with the present invention the insert is made in two parts, an upper part 29 and a lower part 30. Enlarged openings 3| are provided in the faces of each of the halves of the insert where they abut each other. These openings accommodate portions 32 of the contact pins 28. The portions 32 of the pins are of increased diameter and by Virtue of their engagement with the openings 3| the contact pins are confined in position when the parts are assembled.

It will be noted the openings or recesses 3| are tapered or conical shaped in longitudinal cross section. By virtue of this construction the survface distance between the contact point ofthe pin or the enlarged parts thereof at either end with the insert and the contact point of the shell or body portion I2 with the insertis materially increased. Moisture might collect on the surface between the two halves of the insert and this moisture will carry an electrical current. At high voltage if this surface distance is insufficient, the moisture may cause a surface creepage of the current. If the recesses for the enlarged portions of the contact pin were made cylindrical so as to snugly fit and make contact with the pins at the separation line between the two halves of the insert the surface distance between the pins and the interior of thebbody portion would be materially reduced.

The upper half of the insert has a turned down portion at its upperregion which engages an annular shoulder 33 formed in the body portion |I to prevent upward longitudinal displacement of the insert. The under side of the lower half of the insert engages the upper end of sleeve 34. The lower end of the sleeve 34 engages a shoulder 35 formed in the base portion I6. Thus the sleeve 34 is confined between the shoulder 35 and the under face of the lower half of the insert and any longitudinal movement of the insert is prevented.

The sleeve 34 is preferably made in two halves to facilitate assembly and inspection of the connections when desired. It is formed of some suitable plastic which acts as an insulator to prevent contact of the connections 25 with the body portion.

A longitudinally extending bead 35 formed on the body portion engages a suitable groove in the insert to prevent rotational movement of the insert.

To permit of assembly the lower half of the insert has a series of radiating slots 31, one for each contact pin.` The electrical contact pins 28 are secured to the wires 25 which lead to the solenoids or other electrical apparatus on the bomb shackle before assebbling the insert. In assembling, the contact pins are moved into their slots in the lower half of the insert and the upper half of the insert is slid down over the pins. .Tf one desires to put a new solenoid or electrical part in the bomb rack or shackle the respective insert is removed from the receptacle, the tcp half is lifted orf and the contact pin is slid through its respective slot 31. The new contact pin with its wire 25 attached is then slid into the slot 31 and the upper part of the insert placed in position. The radial slots 31 thus permit of this being done without disturbing a soldered connection.

A toe or lug 39 on the body portion engages one of the side plates l to provide greater stability to the receptacle when it is attached to the bomb rack.

From the foregoing it is thought to be apparent that a disconnect plug receptacle has been provided which is exceedingly quick detachable and one that may be quickly assembled or disassembled without soldering or unsoldering any joints and by the removal of only one nut. Any unit is the bomb rack that has a lead wire attached which terminates in the receptacle may be quickly removed. The soldering of the connections to the contact pins 28 is done before assembly and while the pins are loose. This could not be accomplished in a receptacle where the pins are molded in the insert. It not only provides for much speedier work but insures much more accurate and eicient results.

Changes in details of construction and arrangements oi parts such as would occur to one skilled in the art are to be considered as coming within the spirit of the invention as set forth in the appended claims. v

I claim:

1. A disconnect plug receptacle having in combination, a body member, an insulator carried in said body member, electrical contact pins carried by said insulator, a downwardly extending ear from said body member, a base element telescopically receiving the body member, a mounting member upon which said receptacle is carried, said ear, said base element and the mounting member having aligned openings; and a bolt passing throughgsaid aligned openings for securing said receptacle to said mounting member and .providing of pivotal adjustment of the receptacle in relation to the mounting member.

2. A disconnect plug receptacle having in combination, a body member, an insulator carried in said body member, electrical contact pins carried by said insulator, a downwardly extending ear from said body member, a base element, a neck on said base element receiving the body member, said neck engaging a suitable opening in said body member, a splash-proof gasket interposed between the end of said neck and said body member, a mounting member to support the receptacle, said ear, said base element and the mounting member having aligned openings; and a bolt passing through said openings for securing said receptacle to said mounting member and providing of pivotal adjustment of the receptacle in relation to the mounting member.

3. A disconnect ,plug having in combination, a body member, an insulator ,carried in said body member, electrical contact pins carried by said insulator, said insulator being formed of two parts, an upper and lower part, aligned openings in said insulator for the reception of said contact pins, enlarged portions in said openings in the faces of each of the parts of said insulator where they abut each other to accommodate enlarged portions of said contact ,pins, an annular shoulder in said body member engaging the upper part of said insulator to prevent upward longitudinal movement of said insulator, an insulating sleeve mounted in said body member and engaging the lower part of said insulator to prevent downward movement of said insulator, means for preventing rotational movement of said insulator, a base element receiving the body member and the lower portion of said insulating sleeve, a mounting member upon which said receptacle is supported, and means for securing said body member and said base element to said mounting member and providing of pivotal adjustment of said receptacle in relation to said mounting member.

4. A disconnect plug receptacle having in combination, a body member, an insulator carried in said body member, electrical contact pins carried by said insulator, said insulator being formed of two parts, an upper and lower part, aligned openings in said insulator for the reception of said contact pins, enlarged portions in said openings in the faces of each of the parts of said insulator where they abut each other to accommodate enlarged portions of said contact pins, the lower insulator part having radial slots extending from said openings to the periphery thereof to permit of entry of said contact pins in assembling, a base element receiving the body member, a mounting member upon which said receptacle is supported, and means for securing said body member and base element to said mounting member and providing of pivotal adjustment of said receptacle in relation to said mounting member.

5. A disconnect plug receptacle having in combination, a body member, an insulator carried by said body member, Contact pins carried by said `insulator, a downwardly extending ear from said body member, a base element extending transversely to said body member for receiving said body member and acting as a closure for the lower end of said body member and a pivoted support for said body member, a mounting member upon which said receptacle is carried, and common means for securing said ear to said base element and for securing the receptacle to said mounting member.

ROSCOE I. MARKEY. 

